Last month, we addressed the use and compliance of manual draft dampers in mechanical draft applications. We would now like to review another commonly used product used to regulate the flow of air inside of chimney stacks– automatic dampers.
Unlike manual draft dampers that need to be monitored and manually opened or closed, automatic vent dampers have a small motor that opens and shuts itself without human intervention. Programmed thermostat settings trigger these dampers to automatically adjust based on current climate conditions; they open when heat is needed and close once a heat setting is met. The overall function of automatic dampers is the same as damper alternatives: regulating drafts to vent combustion gases from the inside of boiler systems to the outside.
So, what are the benefits of using automatic dampers?
• Money savings: Once a boiler turns off, the auto-close flu traps and stores any escaping heat that can be saved and used for heat recovery later.
• Increased efficiency: Consistently regulated drafts allow boilers to perform at maximum potential.
• Ease of use: Automatic dampers are self-regulated and can be controlled remotely if needed, eliminating the need for constant monitoring.
• Precise climate control: Zoned thermostat settings calculate the exact airflow and temperature needed in each location to meet thermostat settings.
• Safety backup: A safety interlock closes when the damper is open and if the switch does not close, the burner will not ignite.
While the best type of damper for each HVAC installation varies depending on the specific conditions of the boiler system, automatic dampers are widely successful in balancing venting drafts in an efficient and safe manner.
Our extensive line of ENERVEX products includes dampers suitable for any mechanical draft project. Contact UEP today, and let our engineers increase your boiler efficiency while taking the guess work out of installation.